Printing apparatus.



' Upon the 1 UNITED STATES PATENT OFFICE.

ISIDOR IHTSEE, PHILADELPHIA, PENNSYLVANIA.

rnmrme APPARAT S,

. To all whom it may concern .1

films having thereon picture units of a kinematographic series, fromnegative or positive films. To this end I provide a cylin' der or thelike of transparent or translucent,

material, such as glass, and wind helically thereon the film from whichprints are made, and superimpose upon such film the sensiti'zed filmdisposed in like helical p'ath,

means being provided for producing light" within the cylinder to affectthe superimposed orsensitized film through the film'directly upon thecylinder.

My invention resides in apparatus of the character described and in thefeatures hereinafter described and claimed.

For an illustr; tion of one of the forms my invention may take referenceis to be had to the accompanying drawing, in which:

Figure 1 is a longitudinal sectional view, some parts in elevation, of aform my invention may take. Fig. 2 is a cross sectional View taken onthe line AA of Fig. 1, showing parts in elevation. Fig. 3 is a sideelevational view of the printing cylinder removed to' separate supportswhere the films may be wound upon it. Fig. 1 is a sectional view, partsin elevation, taken on the line BB of Fig. 3. Fig. 5-is a fragmentarycross sectional view through a part of the cylinder and the filmsthereon.

Referring to Fig. 1, 1 is any suitable base upon which are secured thesupports 2 and having at their upper ends bearings 1 and respectively,these bearings being'open at the top so that the cylinder C may belifted out of these bearings. The cylinder C, of glass of other suitabletransparent or translucent material, is supported on the end spiders 6and 7, the spider 6 having the hollow shaft 81 1i? nsion 8 resting inthe bearing 5, and the odor 7 having the shaft extension 9 re. p in thebearing '1. Upon the hollow shat is secured a pulley 10 for retating ther 1011;. 1 may be provided supports 1.1 carrying rods 12 upon which mayhe slid ider, as hereinafter described.

Specification of Letters Patent. te t d '7, 1 Application filed October31, 19-12. Serial No. 723,773.

the arms 13 supportingthe base 14 of an electric lamp L which extendsfreely through the hollow shaft 8 and substantially the entire length ofthe cylinder C, preferably in the axis thereof. The base 14 carriesbinding posts 15, 15 to which are connected the electric service Wires16 for dehvering current to the electric lamp L. By moving-the arms 13toward the right,.the lamp'L may be entirely withdrawn from the cylinderC and from the hollow shaft 8 so that the cylinder 0 may be lifted fromits bearings li-and 5. j

lVrapped helically around the outer surfaceof the cylinder C is thepicture film 17 from which prints are to be made. The film 17, either apositive or negative, may be called the master film. Such a movingpicture film has perforations in its margins, and at suitable intervalsin the helical path of the film 17 are pins 18 carried by the .cyl-

.inder C, certain perforations in the film.-

passing over these pins, whereby the, film is securely held in placeupon the cylinder. Then a similar perforated sensitized film 19 is woundupon the cylinder C directly on top 'of the master film 17, certainperforations in the film 19 embracing the same pins 18 whereby bothfilms are kept in proper relation with respect to each other andsecurely upon the cylinder C. Of course the sensitized film 19 is woundon top of the film 17 in a dark room or insuch light as will not affectthe film 19. Then the current is turned on through lamp L for a suitabletime and the exposure of the sensitized film 19 through the master film17 is made. Then the exposed film 19 may be unwound from the cylinder Cand developed in the usual way, and a new sensitized film 19 placed uponthe cylinder C in register with the film 17 for another exposure.

For the purpose of winding the films upon .the cylinder 0 a pulley 10may be provided driven by belt from any suitable means to vrotate thecylinder for the winding or unwinding operaticn. Or the lamp L may bewithdrawn to the right and the cylinder removed from the apparatus shownin Fig. 1 and placed in separate supports 2 and 3' for the windingoperation, the exposures only being made in such case in the appaaplurality of members disposed in a helical path on said cylinder andadapted to enter -into marginal perforations in master and sensitizedfilms, whereby said films are held in superposed position on saidcylinder and in helical relation with respect thereto, and means forproducing light within said cylinder.

2. The. combination with a hollow light transmitting cylinder, of ahollow bearing therefor, a spider supporting said cylinder on saidbearing light producing means, and a guide upon which said lightproducing means may be moved longitudinally of said cylinder throughsaid spider and hollow bearin 3. Tie combination with a hollow lighttransmitting cylinder, of a hollow bearing therefor, a spider supportingsaid'cylinder on said bearing, an incandescent electric lamp, and aguide upon which said lamp is movable longitudinally of said cylinderthrough said spider and hollow bearing.

4. In film printing apparatus, the combination with a film supportingmember, of a master film wrapped upon said supporting member in ahelical path, means adaptedto' hold a sensitized film in a helical pathsuperimposed upon said master film, and means for", producing light fortransmission through said master film to said sensitized film.

In testimony whereof I have hereunto affixed my signature in thepresence of the two subscribing witnesses.

MARY C. SMITH,- EIEANOR T. MCOALL.

